{"id":21903,"date":"2022-11-16T15:26:44","date_gmt":"2022-11-16T09:56:44","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-c-trying-to-read-from-a-file-line-by-line-saving-into-a-vector-and-then-printing-the-vector-prints-nothing\/"},"modified":"2022-11-16T15:26:44","modified_gmt":"2022-11-16T09:56:44","slug":"solved-c-trying-to-read-from-a-file-line-by-line-saving-into-a-vector-and-then-printing-the-vector-prints-nothing","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-c-trying-to-read-from-a-file-line-by-line-saving-into-a-vector-and-then-printing-the-vector-prints-nothing\/","title":{"rendered":"[Solved] C++: Trying to read from a file line by line, saving into a vector and then printing the vector prints nothing"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-45525773\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"45525773\" data-parentid=\"45525439\" data-score=\"1\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>You could &#8211; after skipping the line count &#8211; read in each individual character and compare it to <code>'0'<\/code> or <code>'1'<\/code>. See the following code:<\/p>\n<pre><code>int main() {\n\n    vector&lt;bool&gt; bits;\n    ifstream f(DATAFILE);\n    if (f.is_open()) {\n        int dummy;\n        f &gt;&gt; dummy;\n        char c;\n        while (f &gt;&gt; c) {\n            if (c == '1') {\n                bits.push_back(true);\n            }\n            else if (c=='0') {\n                bits.push_back(false);\n            }\n        }\n        f.close();\n        for(int i = 0; i &lt; bits.size(); ++i){\n            cout &lt;&lt; bits[i] &lt;&lt; \" \";\n        }\n    }\n    return 0;\n}\n<\/code><\/pre>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">2<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved C++: Trying to read from a file line by line, saving into a vector and then printing the vector prints nothing <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] You could &#8211; after skipping the line count &#8211; read in each individual character and compare it to &#8216;0&#8217; or &#8216;1&#8217;. See the following code: int main() { vector&lt;bool&gt; bits; ifstream f(DATAFILE); if (f.is_open()) { int dummy; f &gt;&gt; dummy; char c; while (f &gt;&gt; c) { if (c == &#8216;1&#8217;) { bits.push_back(true); } &#8230; <a title=\"[Solved] C++: Trying to read from a file line by line, saving into a vector and then printing the vector prints nothing\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-c-trying-to-read-from-a-file-line-by-line-saving-into-a-vector-and-then-printing-the-vector-prints-nothing\/\" aria-label=\"More on [Solved] C++: Trying to read from a file line by line, saving into a vector and then printing the vector prints nothing\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[324,910,806],"class_list":["post-21903","post","type-post","status-publish","format-standard","hentry","category-solved","tag-c","tag-ifstream","tag-vector"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] C++: Trying to read from a file line by line, saving into a vector and then printing the vector prints nothing - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-c-trying-to-read-from-a-file-line-by-line-saving-into-a-vector-and-then-printing-the-vector-prints-nothing\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] C++: Trying to read from a file line by line, saving into a vector and then printing the vector prints nothing - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] You could &#8211; after skipping the line count &#8211; read in each individual character and compare it to &#039;0&#039; or &#039;1&#039;. See the following code: int main() { vector&lt;bool&gt; bits; ifstream f(DATAFILE); if (f.is_open()) { int dummy; f &gt;&gt; dummy; char c; while (f &gt;&gt; c) { if (c == &#039;1&#039;) { bits.push_back(true); } ... 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